41,891 to 41,900 of 42,221 Results
Jan 1, 1993
Ross, R. Jr.; Johnson, D; Mon, G.; Smedley, G., 1993, "Cryocooler Resonance Characterization", https://hdl.handle.net/2014/35793, JPL Open Repository
This paper presents the fundamental equations governing cyocooler mechanical efficiency and launch vibration response in terms of their implications for cooler design. |
Jan 1, 1993
Harris, A. W., 1993, "The Probable Ages of Asteroid Families", https://hdl.handle.net/2014/35814, ['Bul. American Astron. Society', 'Tokyo University', 'Tokyo, Japan'], JPL Open Repository
There has been considerable debate recently over the ages of the Hirayama families, and in particular if some of the families are very ҹoungӮ It is a straightforward task to estimate the characteristic time of a collision between a body of a given diameter, d_o, by another body o... |
Jan 1, 1993
Holt, B.; Winebrenner, B.; Nelson E. D., 1993, "Fall Freeze-up of Sea Ice in the Beaufort-Chukchi Seas Using ERS-1 SAR and Buoy Data", https://hdl.handle.net/2014/35937, ['EOS', 'American Geophysical Union', 'San Francisco'], JPL Open Repository
The lowering of air temperatures below freezing in the fall indicates the end of summer melt and the onset of steady sea ice growth. The thickness and condition of ice that remains at the end of summer has ramifications for the thickness that that ice will attain at the end of th... |
Jan 1, 1993
Hunt, B. D.; Barner, J. B.; Foote, M. C.; Vasquez, R. C., 1993, "High Temperature Superconductor Josephson Weak Links", https://hdl.handle.net/2014/35494, ['Proceedings of the Electrochemical Society', 'Second Symposium of Low Temperature Electronics and High Temperature Superconducting', 'Honolulu, Hawaii'], JPL Open Repository
High T_c edge-geometry SNS microbridges have been fabricated using ion-damaged YBa_2Cu_3O_(7-x) (YBCO) and a nonsuperconducting phase of YBCO (N-YBCO) as normal metals. Optimization of the ion milling process used for YBCO edge formation and cleaning has resulted in ion-damage ba... |
Jan 1, 1993
Himelblau, H.; Kern, D. L.; Davis, G. L., 1993, "Summary of Cassini Acoustic Criteria Development Using Titan IV Flight Data", https://hdl.handle.net/2014/35681, Institute of Environmental Sciences, JPL Open Repository
The Cassini spacecraft is being developed by the Jet Propulsion Laboratory (JPL) for theNational Aeronautics and Space Administration (NASA) to orbit and explore the planet Saturn, itsrings and satellites. Cassini will be launched on a Titan IV and boosted out of earth orbit by a... |
Jan 1, 1993
Johnson, T. V.; Matson, D. L.; Veeder, G. J.; Blaney, D. L.; Goguen, J. D., 1993, "Implication of the January 1990 Volcanic Eruption on Io for Resurfacing Rates and Energetics", https://hdl.handle.net/2014/36446, ['American Geophysical Union, Fall Meeting', 'San Francisco, CA'], JPL Open Repository
The high temperature event observed by ground based infrared radiometry of Io in January of 1990 can be modeled as an extremely active silicate lava flow which increased its area and cooled over a period of three hours. The best model at the start of the observations is a thermal... |
Jan 1, 1993
Gross, R. S.; Marcus, S. L.; Dickey, J. O., 1993, "Earth Rotation and Global Change", https://hdl.handle.net/2014/35891, ['EOS, Transactions of the AGU', 'American Geophysical Union: Geophysics', 'San Francisco, CA'], JPL Open Repository
Global climate change, whether from natural or man-made causes, can be expected to lead to changes in the Earth's rotation. General Circulation Models (GCMs) of the atmosphere that have been used to study the effects of changes in the amount of atmospheric greenhouse gasses gener... |
Jan 1, 1993
Mansour, K.; Alverex, D. Jr.; Perry, K. J.; Choong, I.; Marder, S. R.; Perry, J. W., 1993, "Dynamics of Optical Liniting in Heavy-Atom Substituted Phthalocyanines", https://hdl.handle.net/2014/35405, Los Angeles, California, USA, JPL Open Repository
Picosecond and nanosecod nonlinear transmission measurements were used to determine the excited singlet-and triplet-state absorption across sections at 532 nm for group IVA metalloid phthalocyanines. |
Jan 1, 1993
Abrams, M.; Davis, S.; Rao, M.; Engleman, R. Jr., 1993, "High Resolution Fourier Transform Spectroscopy of the Vibration-Rotation Spectrum of the OD Radical", https://hdl.handle.net/2014/35982, Journal of Molecular Spectroscopy, JPL Open Repository
The infrared spectrum of the deuterated hydroxyl radical OD has been measured with a fourier transform spectrometer between 1850 and 9000 cm-1. |
Jan 1, 1993
Schwuttke, U.M.; Gasser, L., 1993, "Improving Real-time Performance of Intelligent Systems with Dynamic Trade-off Evaluation", https://hdl.handle.net/2014/36342, USA, JPL Open Repository
This paper describes dynamic trade-off evalation (DTE), a new technique that has been developed to improve the performance of real-time problem solving systems. The DTE technique is most suitable for environments in which the requirement for meeting time constraints is of equal o... |